Does spray-in attic insulation lose any insulation integrity over time or does the insulation maintain its insulation
by
Dan
+1
integrity over a 20-30 year period? Does homeowner need to maintain such insulation integrity by adding/replacing such attic insulation?
4 answers
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The new type of foam used is much more chemically inert (and stable) than foams of the past. This stuff is made to last. The foam has been used for over 30 years in commercial metal low-slope roofs. The heat of that environment is far more than you'll ever sustain in your home, and there is no need to add or replace in later years (unless you want a higher R Value). The biggest concern with spray-in insulation, as I see it, is the possibility of having to remove it in the event of a leak.
Brent B
on Feb 08, 2011
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Spray in cellulose will have a shrinkage factor. It wont loose any integrity and you can always add more!
Select Home Needs, Inc.
on Feb 08, 2011
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Cellulose insulation settles over time, but should retain its insulation levels. However, any moisture can seriously diminish the thermal efficiency of the insulation.
3po3
on Feb 08, 2011
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Blown fibergass insulation or fiberglass batts do not settle or deteriorate over time. Foam Insulation is way over priced for its value. If you seal the penetration RIGHT and install R15 or R21 high density fiberglass batts in the walls. You will get a great R-Value at a reasonable price.
Trey P
on Sep 24, 2011
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